You are not making things complicated, for me controlling local widgets from global rack space is the critical thing, mapping controllers to widgets in each local rack space is silly and inefficient.
Unfortunately, GP doesn’t have a way to do it, the solution for grouping local and global widgets work the other way around for whatever reason I could never fully understand.
I made a solution for this with scripting, but it is complicated. Use X-Touch Mini to control everything (gig, scripts, panel & overlay templates included)